A novel distributed fiber optics sensor used for road vehicle information collection system was proposed. Optical fiber was fixed on the road surface to be used as the sensing media. The vehicle information such as speed, vehicle type, vehicle weight and traffic flow can be obtained. To increase the sensitivity of such sensor, an optical Fabry-Perot (F-P) fiber interference was used. Sensing optical fiber was designed to be with a metal coating for fiber protection and high performance. Experiment results show that such distributed fiber optics sensor may be with a high performance in transportation area without digging when it is installed on the road surface.

A one‐step synthesis procedure for starch‐based acrylate superabsorbent polymers was proposed. The reaction conditions that may affect the water absorption capacity were discussed. A transparent gel‐like polymer containing urea (USAP) was successfully obtained by dissolving starch in a NaOH solution without further gelatinizing processing and using AA directly without prior neutralization. Urea was used as the nitrogen source and pore‐forming agent to improve the performance of the USAP. The optimum reaction conditions of the swelling ratio were also studied. A corn starch USAP was synthesized under the optimum conditions, and the water absorbency was 2704 ± 22, 561 ± 39, 100 ± 5, and 96 ± 4 g/g, respectively, in distilled water, running water, physiological saline, and artificial urine. Five kinds of starch‐based USAPs were also successfully prepared under the same conditions with excellent water absorption capacities, revealing that the one‐step method was a more convenient method for a potential industrial application pathway. The polymers were characterized by scanning electron microscopy, Fourier transform infrared spectroscopy, X‐ray diffraction, and thermogravimetric analysis. The results indicated that the PAA chains were successfully grafted onto the St backbone. However, the St molecular structure was not completely destroyed during the graft polymerization. The thermal analysis and nitrogen content results proved that urea was also involved in the graft copolymerization. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2017, 134, 45175.

By the approaches of the theory of complex functions, two dynamic propagation problems of symmetrical mode Ⅲ crack were researched. The problems considered can be very facilely changed into Riemann-Hilbert problem by means of self-similar functions, and the general representations of analytical solutions of the stress, the displacement and dynamic stress intensity factor under the conditions of moving variable loads Pt and Px2/t2 which were applied the edges of mode Ⅲ crack, respectively, were readily acquired.

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Mg, Ni and Cu nanoparticles were prepared by hydrogen plasma-metal reaction method. Nanostructured Mg2Ni and Mg2Ni0.75Cu0.25 compound were successfully obtained using the metal nanoparticles. The synthesis mechanism, the structure and lattice parameter difference, and the hydrogen absorption behaviors of the two compounds were discussed.

Percutaneous endoscopic lumbar discectomy (PELD) is a minimally invasive technique started during the late 20 th century. This process is done through microscopic view under local anesthesia. There is a growing but still insufficient evidence that lumbar EDS shows slightly better results in terms of minor tissue damage, shorter hospital stay, faster return to ordinary daily activities, and patient satisfaction. Recurrence rate still remains a matter of debate, and is related with the surgical skills of the surgeon. The complication rate seems to be similar in both of the techniques i.e., open and endoscopic. More randomized controlled trials, systematic reviews and meta-analysis are needed to clarify whether lumbar EDS can be considered comparable if not superior to standard open discectomy. In spite of lacking defined clinical evidence, lumbar EDS is without doubt a rapidly expanding PELD and its future developments are incredibly promising. Due to less complication rate this technique can be considered as a gold standard compared to the open discectomy. The surgeons still require more cadaveric practices for learning the curve and to approach the herniated disc area. The main objective of this review article is to show the clinical outcomes of the Transforaminal Percutaneous Endoscopic Discectomy in treating the lumbar disc herniation.

Dislocation distribution functions of mode I dynamic crack subjected to two loads were studied by the methods of the theory of complex variable functions. By this way, the problems researched can be translated into Riemann-Hilbert problems and Keldysh-Sedov mixed boundary value problems. Analytical solutions of stresses, displacements and dynamic stress intensity factors were obtained by the measures of self-similar functions and corresponding differential and integral operation. The analytical solutions attained relate to the crack propagation velocity and time, but the solutions have nothing to the other parameters. In terms of the relationship between dislocation distribution functions and displacements, analytical solutions of dislocation distribution functions were gained, and variation rules of dislocation distribution functions were depicted.

By means of the built dynamic fracture model of bridging fiber pull-out of composite materials, the problems considered will be transformed into Riemann-Hilbert problem in terms of the theory of complex functions. Analytical solutions of the stresses displacements, dynamic stress intensity factors, strain energy release rate and bridging fibrous fracture speeds under the conditions of an moving increasing loads, Pt/x, Px2/t, respectively, can be facilely obtained by the approaches of self-similar functions. After those solutions were utilized by superposition theorem, the solutions of arbitrary complex problems can be attained.